Enhance simple Javascript code (Max 20$)

Attachment please find the animation from what we want to be implemented. I would like to modify below changes to the following javascript code called D3.js Download code from here [login to view URL] Example of force graph with D3.js [login to view URL] Changes that we want to force graph are: 1. Use image for nodes. PNG format. 2. Responsive design. change circle/image size base on screen size. 3. And the important one which is FIX node locations. (Some nodes are fixed and rest will be calculated base on force graph algorithm) Here is example for fixed nodes of D3 [login to view URL] Regards